// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_
#define UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_

#include <jni.h>
#include <string>

#include "base/macros.h"
#include "ui/gfx/gfx_export.h"

namespace gfx {

// Facilitates access to device information typically only
// available using the Android SDK, including Display properties.
class GFX_EXPORT DeviceDisplayInfo {
public:
    DeviceDisplayInfo();
    ~DeviceDisplayInfo();

    // Returns display height in physical pixels.
    int GetDisplayHeight() const;

    // Returns display width in physical pixels.
    int GetDisplayWidth() const;

    // Returns real display height in physical pixels.
    // This version does not subtract window decorations etc.
    // WARNING: This is only supported on JB-MR1 (sdk >= 17). Either
    //          check the SDK-level, or check for '0' being returned.
    int GetPhysicalDisplayHeight() const;

    // Returns real display width in physical pixels.
    // This version does not subtract window decorations etc.
    // WARNING: This is only supported on JB-MR1 (sdk >= 17). Either
    //          check the SDK-level, or check for '0' being returned.
    int GetPhysicalDisplayWidth() const;

    // Returns number of bits per pixel.
    int GetBitsPerPixel() const;

    // Returns number of bits per component.
    int GetBitsPerComponent() const;

    // Returns a scaling factor for Density Independent Pixel unit
    // (1.0 is 160dpi, 0.75 is 120dpi, 2.0 is 320dpi).
    double GetDIPScale() const;

    // Smallest possible screen size in density-independent pixels.
    int GetSmallestDIPWidth() const;

    // Returns the display rotation angle from its natural orientation. Expected
    // values are one of { 0, 90, 180, 270 }.
    // See DeviceDispayInfo.java for more information.
    int GetRotationDegrees() const;

private:
    DISALLOW_COPY_AND_ASSIGN(DeviceDisplayInfo);
};

} // namespace gfx

#endif // UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_
